Title :
Spectral efficiency of OCDMA/OCDMA with asymmetric power assignment
Author :
Vanhaverbeke, Frederik ; Moeneclaey, Marc
Author_Institution :
TELIN/DIGCOM, Ghent Univ., Belgium
Abstract :
The sum capacity of the OCDMA/OCDMA (O/O) signature sequence set is investigated when the users of the two orthogonal sets are allowed to have a different average-input-energy constraint and with perfect synchronization of the users. It is found that the sum capacity is dependent on the load and the respective SNR only, but independent of the choice of the orthogonal sets. For a fixed total power and when the power constraints of the two user sets are allowed to be different, it is shown that the sum capacity of the O/O system can be made arbitrarily close to the sum capacity of the Gaussian multiple access channel.
Keywords :
Gaussian channels; code division multiple access; resource allocation; Gaussian channel; OCDMA; SNR; asymmetric power assignment; average-input-energy constraint; multiple access channel; orthogonal CDMA; orthogonal sets; power constraints; signature sequence; spectral efficiency; sum capacity; Bit error rate; Bit rate; Discrete wavelet transforms; Eigenvalues and eigenfunctions; H infinity control; Multiaccess communication; Optical wavelength conversion; Upper bound; User-generated content;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on
Print_ISBN :
0-7803-7589-0
DOI :
10.1109/PIMRC.2002.1045472
